LRS Bianchi type-V universe with variable modified Chaplygin gas in a scalar–tensor theory of gravitation

Santhi, M. Vijaya; Rao, V. U. M.; Aditya, Y.

doi:10.1139/cjp-2016-0099

Cited by 27 publications

(4 citation statements)

References 53 publications

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“…However, the jerk parameter for BT-II is independent of time. Santhi and Naidu [115], Rao et al [116], Santhi et al [117], Rao and Prasanthi [118], and Shaikh et al [119] are some of the researchers who have acquired a constant jerk parameter in their work.…”

Section: Jerk Parameter (J)mentioning

confidence: 99%

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Santhi

Chinnappalanaidu

Madhu

et al. 2022

Advances in Astronomy

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In this article, we analyze Bianchi type–II, VIII, and IX spatially homogeneous and anisotropic space-times in the background of the Brans–Dicke theory of gravity within the framework of viscous holographic dark energy. To solve the field equations, we have used the relation between the metric potentials as R = S n and the relation between the scalar field ϕ and the scale factor a as ϕ = a m . Also, we have discussed some of the dynamical parameters of the obtained models, such as the deceleration parameter q , the jerk parameter j , the EoS parameter ω v h d e , the density parameter Ω vhde , Om-diagnostic, squared speed of sound v s 2 , EoS plane ω v h d e − ω v h d e ′ , and statefinder plane r − s through graphical representation, which are significant in the discussion of cosmology. Furthermore, all the models obtained and graphically presented shown an expanding and accelerating Universe, which is in better agreement with the latest experimental data. The viscous holographic dark energy models are compatible with explaining the present cosmic accelerated expansion.

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Section: Jerk Parameter (J)mentioning

confidence: 99%

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Santhi

Chinnappalanaidu

Madhu

et al. 2022

Advances in Astronomy

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“…In literature it is also common to use a power-law relation between BD scalar field φ and average scale factor 'a' of the form φ = φ 0 a l [89,90], where φ 0 is a constant and l is a power index. Various authors have discussed different aspects of this form of scalar field φ and have shown that it leads to constant deceleration parameter [72,91] and also time varying deceleration parameter [92,93]. Recently, Kumar and Singh [94] have introduced a BD scalar field evolves as a logarithmic function of the average scale factor to study the evolution of holographic and new agegraphic DE models.…”

Section: Tsallis Holographic Dark Energy In Bd Theorymentioning

confidence: 99%

Observational constraint on interacting Tsallis holographic dark energy in logarithmic Brans–Dicke theory

Aditya¹,

Mandal²,

Sahoo³

et al. 2019

Eur. Phys. J. C

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In this paper, we investigate the dark energy phenomenon by studying the Tsallis holographic dark energy within the framework of Brans-Dicke (BD) scalar-tensor theory of gravity [Phys. Rev. 124, 925 (1961)]. In this context, we choose the BD scalar field φ as a logarithmic function of the average scale factor a(t) and Hubble horizon as the IR cutoff (L = H −1 ). We reconstruct two cases of non-interacting and interacting fluid (dark sectors of cosmos) scenario. The physical behavior of the models are discussed with the help of graphical representation to explore the accelerated expansion of the universe. Moreover, the stability of the models are checked through squared sound speed v 2 s . The well-known cosmological plane i.e., ω de − ω de is constructed for our models. We also include comparison of our findings of these dynamical parameters with observational constraints. It is also quite interesting to mention here that the results of deceleration, equation of state parameters and ω de − ω de plane coincide with the modern observational data.Keywords Tsallis holographic dark energy · Brans-Dicke gravity · cosmological parameters · dark energy · logorithemic scalar field PACS 04.50.kd.

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“…Rao et al [10] have discussed FRW holographic dark energy cosmological model in Brans-Dicke theory of gravitation. Rao and Jayasudha [11] [12] have discussed holographic dark energy model with generalized Chaplygin gas in this theory of gravitation. Rao and Prasanthi [13] have studied Bianchi type V I 0 generalized ghost pilgrim dark energy model in Brans-Dicke theory of gravitation.…”

Section: Introductionmentioning

confidence: 99%

Bianchi type-VI₀ modified holographic Ricci dark energy model in a scalar–tensor theory

2017

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In this paper, we consider Bianchi type-VI0 space–time filled with anisotropic modified holographic Ricci dark energy in a scalar–tensor theory proposed by Brans–Dicke (Phys. Rev. 124, 925 (1961)). The field equations in this scalar–tensor theory, have been solved for the following physically relevant assumptions: (i) the scalar field ([Formula: see text]) is proportional to average scale factor (a(t)), (ii) expansion scalar (θ) in the model is proportional to shear scalar (σ). It has been observed that the presented universe is in an accelerating phase at the present epoch, which is in good agreement with the recent astronomical observations. We have also discussed some other properties of the obtained model.

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LRS Bianchi type-V universe with variable modified Chaplygin gas in a scalar–tensor theory of gravitation

Cited by 27 publications

References 53 publications

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Observational constraint on interacting Tsallis holographic dark energy in logarithmic Brans–Dicke theory

Bianchi type-VI₀ modified holographic Ricci dark energy model in a scalar–tensor theory

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LRS Bianchi type-V universe with variable modified Chaplygin gas in a scalar–tensor theory of gravitation

Cited by 27 publications

References 53 publications

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Some Bianchi Type Viscous Holographic Dark Energy Cosmological Models in the Brans–Dicke Theory

Observational constraint on interacting Tsallis holographic dark energy in logarithmic Brans–Dicke theory

Bianchi type-VI0 modified holographic Ricci dark energy model in a scalar–tensor theory

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Bianchi type-VI₀ modified holographic Ricci dark energy model in a scalar–tensor theory